Sand dunes season opener Monday. #SilverLakeSandDunes #SilverLakeStatePark By Allison Scarbrough, Editor. GOLDEN TOWNSHIP – The only place of its kind in the US east of the Mississippi River, the Silver Lake Sand Dunes open for the 2019 season Monday, April 1. Approximately 1 million people visit the scenic and unique park every year, said Silver Lake State Park Manager Jody Johnston.…